Evaluation of the usefulness of the masking on un-smoothed image method in ²⁰¹Tl myocardial perfusion SPECT.

IF 1.5 Q3 RADIOLOGY, NUCLEAR MEDICINE & MEDICAL IMAGING

Radiological Physics and Technology Pub Date : 2025-09-10 DOI:10.1007/s12194-025-00959-2

Ryuichi Miyajima, Ryo Ueno, Ryosuke Ichino, Satomi Teraoka, Ishikawa Yasushi, Masahiro Sonoda

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引用次数: 0

Abstract

In ²⁰¹Tl myocardial perfusion single-photon emission computed tomography (SPECT), gastric wall uptake can impact the inferior wall. This study aimed to evaluate the effectiveness and usefulness of the masking on un-smoothed image (MUS) method for ²⁰¹Tl myocardial perfusion SPECT. A hemispherical gastric wall phantom was created to simulate the gastric fundus located closest to the myocardium, and the activity was enclosed to achieve an SPECT count ratio against the myocardium equivalent to that observed in clinical practice. The minimum values of the defect chip in the circumferential profile curve were compared for six SPECT count ratios and seven gap distances. In the conventional method, increasing SPECT count ratios or gap distances interfered with myocardial perfusion SPECT evaluation. Artifacts were less apparent when the MUS method was applied. The MUS method effectively suppressed the gastric wall uptake on ²⁰¹Tl myocardial perfusion SPECT.

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201Tl心肌灌注SPECT非平滑图像掩模方法的有效性评价。

在201Tl心肌灌注单光子发射计算机断层扫描（SPECT）中，胃壁摄取可影响下壁。本研究旨在评价非平滑图像（MUS）方法在201Tl心肌灌注SPECT中的有效性和实用性。创建一个半球形胃壁幻象来模拟位于最靠近心肌的胃底，并将其活动封闭以达到与临床实践中观察到的心肌相当的SPECT计数比。比较了6种SPECT计数比和7种间隙距离下缺陷芯片在周向轮廓曲线上的最小值。在常规方法中，增加SPECT计数比或间隙距离会干扰心肌灌注SPECT评价。当应用MUS方法时，工件不太明显。在201Tl心肌灌注SPECT上，MUS法能有效抑制胃壁摄取。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Radiological Physics and Technology RADIOLOGY, NUCLEAR MEDICINE & MEDICAL IMAGING-

CiteScore

3.00

自引率

12.50%

发文量

期刊介绍： The purpose of the journal Radiological Physics and Technology is to provide a forum for sharing new knowledge related to research and development in radiological science and technology, including medical physics and radiological technology in diagnostic radiology, nuclear medicine, and radiation therapy among many other radiological disciplines, as well as to contribute to progress and improvement in medical practice and patient health care.